I have the Gear Fit now taken 6 days with a single battery charge (despite 2 x Running tracking, permanent arm, but at night with sleep tracking, which activates the sleep mode). I have it connected to a HTC One (M7) (goes by manually install the Fitness Manager app). This works all pretty easily, unfortunately, you can then but no data as the counted steps or the sleep tracking the mobile sync (Note: it is probably already going when you walk around edited build.prop in the system file, but that's going too far). The pedometer Part I think is really accurate, at least he does not count with brushing teeth and otherwise even if the keypad work hard steps are identified. But he is accurate enough to also be counted when walking, when you hold the phone in the same hand. Enabling the display has not always reliable work by moving the arm in reading position. Every now and then I had to do it twice, and then seemed to me as if I have to make an extra exaggerated the movement, so it goes. But this is all still bearable. Really it goes back only for the reason, because I do not feel the comfort as optimal. Thus, the heart rate monitor works jogging tracking, the Gear Fit must sit quite substantially, especially since I do not always like it when the clock herumschlabbert arm. Unfortunately, then makes the plastic back and the bracelet (made of resin or something similar) noticeable. You sweat very easily underneath, but this is uncomfortable when worn for nearly permanent. Now why I go for now back to my watch - the next pleasant to supporting devices come soon enough.